jumpURL = new Array();
imgURL  = new Array();
imgALT  = new Array();

jumpURL[0] = "/battlespirits_dan/";
imgURL[0]  = "/banner/dan_728x90.jpg";
imgALT[0]  = "バトルスピリッツ 少年激覇ダン";

jumpURL[1] = "/arukotonaikoto/";
imgURL[1]  = "/banner/arukotonaikoto_regular(728_90).jpg";
imgALT[1]  = "キングコングのあるコトないコト";

n = Math.floor(Math.random()*jumpURL.length);
document.write("<a href='"+jumpURL[n]+"'>");
document.write("<img src='"+imgURL[n]+"' border='0' width='728' height='90' alt='"+imgALT[n]+"' />");
document.write("</a>");